Question

A body of mass 5 kg initially at rest is subject to a force of 20 N. What is the kinetic energy acquired by the body at the end of 10s ?

Answer 1

F=ma
a=20/5
a=4m/s^2
K. E=1/2mv^2 ( v=at)
=1/2m(at) ^2
=1600×5/2
=4000